MeasurementCache.java
/*
* This file is part of WattDepot.
*
* Copyright (C) 2014 Cam Moore
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.wattdepot.server.depository.impl.hibernate;
import org.wattdepot.common.domainmodel.InterpolatedValue;
import java.util.HashMap;
/**
* Caches the earliest and latest measurements organized by Organization, Depository and Sensor.
* Created by Cam Mmoore on 12/3/14.
* @author Cam Moore
*/
public class MeasurementCache {
// OrgId, DepositoryId, SensorId, MeasurementChachePair
private HashMap<String, HashMap<String, HashMap<String, MeasurementCachePair>>> cache;
/** Default constructor.*/
public MeasurementCache() {
this.cache = new HashMap<String, HashMap<String, HashMap<String, MeasurementCachePair>>>();
}
/**
* Gets the earliest measurement date for the given sensor.
* @param orgId The organization id.
* @param depotId The depository id.
* @param sensorId The sensor id.
* @return The earliest measurement as an InterpolatedValue or null if there aren't any measurements.
*/
public InterpolatedValue getEarliest(String orgId, String depotId, String sensorId) {
HashMap<String, HashMap<String, MeasurementCachePair>> orgMap = cache.get(orgId);
if (orgMap == null) {
return null;
}
HashMap<String, MeasurementCachePair> depotMap = orgMap.get(depotId);
if (depotMap == null) {
return null;
}
MeasurementCachePair sensorInfo = depotMap.get(sensorId);
if (sensorInfo == null) {
return null;
}
else {
return sensorInfo.getEarliest();
}
}
/**
* Gets the date of the latest measurement for the given sensor.
* @param orgId The organization id.
* @param depotId The depository id.
* @param sensorId The sensor id.
* @return The latest measurement as an InterpolatedValue or null if there aren't any measurements.
*/
public InterpolatedValue getLatest(String orgId, String depotId, String sensorId) {
HashMap<String, HashMap<String, MeasurementCachePair>> orgMap = cache.get(orgId);
if (orgMap == null) {
return null;
}
HashMap<String, MeasurementCachePair> depotMap = orgMap.get(depotId);
if (depotMap == null) {
return null;
}
MeasurementCachePair sensorInfo = depotMap.get(sensorId);
if (sensorInfo == null) {
return null;
}
else {
return sensorInfo.getLatest();
}
}
/**
* Updates the Sensor's information with the given InterpolatedValue.
* @param orgId The organization id.
* @param depotId The depository id.
* @param sensorId The sensor id.
* @param iv The interpolated value for the measurement.
*/
public void update(String orgId, String depotId, String sensorId, InterpolatedValue iv) {
HashMap<String, HashMap<String, MeasurementCachePair>> orgMap = cache.get(orgId);
if (orgMap == null) {
orgMap = new HashMap<String, HashMap<String, MeasurementCachePair>>();
cache.put(orgId, orgMap);
}
HashMap<String, MeasurementCachePair> depotMap = orgMap.get(depotId);
if (depotMap == null) {
depotMap = new HashMap<String, MeasurementCachePair>();
orgMap.put(depotId, depotMap);
}
MeasurementCachePair sensorInfo = depotMap.get(sensorId);
if (sensorInfo == null) {
sensorInfo = new MeasurementCachePair(iv);
depotMap.put(sensorId, sensorInfo);
}
else {
sensorInfo.update(iv);
}
}
}